I'm perfectly happy with my progressives, except for the horizon part. Can't
take too much prism (astig. correcction) as it gives me unbelievable
headaches.
Bill Pearce
----- Original Message -----
From: <usher99@xxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Tuesday, November 04, 2008 6:52 PM
Subject: [OM] Dealing with astigmatism through the viewfinder
>
>
> Hmmm,
>
> Data I've seen that showed corneal thinning reversed within one month
> of discontinuation, though this is outside my normal area. From what
> I've seen there are restrictions on who can be corrected with these
> specialized contacts for astig. I dislike using glasses with a VF too.
> I've seen clear data that the multi focal radial contacts ( likely as
> well in the radial design multifocal replacment lenses with cataract
> surgery) reduce contrast and resolution though may still work very
> nicely for some. Whether they can be made with astig correction as
> well, I don't know.
> Worth a look in any event.
> Perhaps a custom diopter with one of the add on eyecups made by your
> optometrist---would clearly need a 2nd version for vertical
> orientation. Doesn't sound super convenient but possible. I am
> surprised this issue has been so poorly addressed by the manufacturers.
> Should be engineered so that the eyecup can be rotated or at least the
> custom diopter could be rotated so that the astig. correction is
> properly oriented.
>
> Live view focusing is another slower solution. excuse to get MKII?
>
> At least the replacement lenses with IOP cataract surgery are
> progressing nicely. It appears the ones that hook up to the ciliary
> apparatus may be a Leica solution for many. We'll see how the data
> holds up.
>
> http://www.allaboutvision.com/conditions/iols.htm
>
>
> http://www.crystalens.com/IsCrystalensRightForYou.aspx
>
> Mike
> (who has a self-interest in keeping Dr. Focus in focus)
>
>
> So my question is how do y'all recommend I do this? A separate
> correction lens for the viewfinder? If so, how do I attach it and
> account for the need for correct rotational positioning of a lens
> designed for astigmatic correction? Or do I just use my distance vision
> glasses and adjust the diopter dial on the camera as needed. I've also
> just ordered my first ever set of bifocals. They've not arrived yet.
> Any problems with using them looking through the viewfinder?
>
> Thanks,
> Chuck Norcutt
>
>
> ==============================================
> List usage info: http://www.zuikoholic.com
> List nannies: olympusadmin@xxxxxxxxxx
> ==============================================
--------------------------------------------------------------------------------
No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.175 / Virus Database: 270.8.6/1766 - Release Date: 11/4/2008
8:26 AM
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|